Geosynthetic clay liners: effect of structural properties and additives on hydraulic performance and durability

In this study, the effects of some structural parameters and also two kinds of additives on hydraulic performance, self-healing ability and wet/dry durability of GCL are experimentally studied. Structural parameters include bentonite mass per unit area of GCL and needle-punching density. Nano-clay p...

Full description

Saved in:
Bibliographic Details
Published in:Environmental earth sciences 2018-03, Vol.77 (5), p.1-13, Article 168
Main Authors: Salemi, Niloofar, Abtahi, Seyed Mehdi, Rowshanzamir, Mohammadali, Hejazi, Seyed Mehdi
Format: Article
Language:English
Subjects:
Additives
Bentonite
Biogeosciences
Capacity
Clay
Clay liners
Durability
Earth and Environmental Science
Earth Sciences
Environmental Science and Engineering
Geochemistry
Geology
Geosynthetics
Hydraulic conductivity
Hydraulics
Hydrology/Water Resources
Monte Carlo simulation
Original Article
Parameters
Permeability
Polymers
Sodium
Superabsorbent polymers
Terrestrial Pollution
Toughness
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:In this study, the effects of some structural parameters and also two kinds of additives on hydraulic performance, self-healing ability and wet/dry durability of GCL are experimentally studied. Structural parameters include bentonite mass per unit area of GCL and needle-punching density. Nano-clay particles and sodium poly-acrylate which is a kind of superabsorbent polymers (SAPs) are used as additives. The results show that bentonite mass can affect the permeability of GCL, but it does not impress the healing time and wet/dry durability. Needle-punching density in needle-punched GCLs positively affects both hydraulic performance in case of hydraulic conductivity, self-healing capacity and wet/dry durability. The test results also show that nano-clay particles considerably improve the permeability and self-healing capacity, while they have negative effects on durability of GCL. On the other hand, the wet/dry durability of GCL dramatically enhances by using SAP, while hydraulic performance of GCL is not much affected by SAP inclusion. Experimental results show that using both nano-clay and SAP in GCL can improve its permeability, self-healing capacity and wet/dry durability simultaneously.
ISSN:1866-6280
1866-6299
DOI:10.1007/s12665-018-7364-z